Implement interfaces in PaintInfo and make it a class.

Source/core/rendering/RenderRegion.cpp

 /*
  * Copyright (C) 2011 Adobe Systems Incorporated. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1. Redistributions of source code must retain the above
  *    copyright notice, this list of conditions and the following
  *    disclaimer.
@@ skipping 158 matching lines @@
 {
     if (style()->visibility() != VISIBLE)
         return;
 
     RenderBlock::paintObject(paintInfo, paintOffset);
 
     // Delegate painting of content in region to RenderFlowThread.
     // RenderFlowThread is a self painting layer (being a positioned object) who is painting its children, the collected objects.
     // Since we do not want to paint the flow thread content multiple times (for each painting phase of the region object),
     // we allow the flow thread painting only for the selection and the foreground phase.
-    if (!isValid() || (paintInfo.phase != PaintPhaseForeground && paintInfo.phase != PaintPhaseSelection))
+    if (!isValid() || (paintInfo.getPhase() != PaintPhaseForeground && paintInfo.getPhase() != PaintPhaseSelection))
         return;
 
     setRegionObjectsRegionStyle();
     m_flowThread->paintFlowThreadPortionInRegion(paintInfo, this, flowThreadPortionRect(), flowThreadPortionOverflowRect(), LayoutPoint(paintOffset.x() + borderLeft() + paddingLeft(), paintOffset.y() + borderTop() + paddingTop()));
     restoreRegionObjectsOriginalStyle();
 }
 
 // Hit Testing
 bool RenderRegion::hitTestFlowThreadContents(const HitTestRequest& request, HitTestResult& result, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction action)
 {
@@ skipping 452 matching lines @@
 
     LayoutUnit autoHeight = hasOverrideHeight() ? overrideLogicalContentHeight() : computedAutoHeight();
 
     LayoutUnit newLogicalHeight = autoHeight + borderAndPaddingLogicalHeight();
     ASSERT(newLogicalHeight < LayoutUnit::max() / 2);
     if (newLogicalHeight > logicalHeight())
         setLogicalHeight(newLogicalHeight);
 }
 
 } // namespace WebCore